Device for combined B-scan and B/A imaging

Details Device for combined B-scan and B/A imaging Device for combined B-scan and B/A imaging

1986-02-04

1987-10-27

Kamm, William E.

Surgery

Truss

Pad

A61B 1000

Patent

active

047022582

ABSTRACT:
The combined modality device comprises an ultrasound transducer (10) which is suitable for transmission as well as reception and which is connected to a transmitter stage (20) as well as to a receiver stage (30). The transducer (10) has a bandwidth which at least equals approximately one octave. The transmitter stage (20) comprises a generator for generating activation signals for the transducer (10) with a frequency f.sub.o near the lower limit of said bandwidth, the spectrum of these activation signals excluding the frequency f.sub.1 =2f.sub.o. The receiver stage (30) comprises a B-scan channel and also a B/A processing channel (200) which itself includes a bandpass filter (210) which is centered around said frequency f.sub.1, an envelope detector (220, 230), a comparison circuit (240), a differentiation circuit (250) and a display device (260) whereby measured results in both modalities may be displayed.

REFERENCES:
patent: 4566460 (1986-01-01), Sato et al.
patent: 4605008 (1986-08-01), Ferrori
patent: 4610255 (1986-09-01), Shimura et al.
Sanders, R. C. et al., "Ultrasound Annual-Ultrasonic Tissue Characterization" Raven Press, N.Y. 1985 pp. 122, 125-127.

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